Nephrite Jade
Nephrite
Mineral/Rock
Category
Man Made Composite (Lithified Equivalent Of Sedimentary)
Browse man made composite (lithified equivalent of sedimentary) specimens identified by the Rock Identifier community.
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Hematite
Iron(III) oxide (Fe2O3)
mineral
Red Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Red jasper fragment
Jasper, microcrystalline quartz (SiO₂) colored chiefly by iron oxides
mineral
Polished red jasper beads
Jasper, microcrystalline quartz (SiO₂), colored mainly by iron oxides
mineral
Chert (specifically Flint)
Microcrystalline quartz (SiO2)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (primarily Quartz-rich)
sedimentary
Sandstone
Arenite (primarily Quartz and Feldspar)
sedimentary
River Stone (Limestone)
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Sandstone
Arenite (primarily Quartz-rich sedimentary rock)
sedimentary
Sandstone (Ferruginous)
Arenite (SiO2 with Fe2O3 inclusions)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Satin Spar (Selenite)
Gypsum (Calcium Sulfate Dihydrate) - CaSO4·2H2O
mineral
Carnelian
Carnelian (Cryptocrystalline Quartz, SiO2)
mineral
Small seashell fossil or shell fragment
Likely calcium-carbonate shell material, chiefly aragonite or calcite; exact species indeterminate
fossil
Red Jasper
Silicate (SiO2 with Hematite impurities)
sedimentary
Sandstone
Sandstone (arenite is a more specific geological term for a clean sandstone, while wacke refers to a dirty sandstone with significant matrix)
Sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Diabase (also known as Dolerite)
Diabase / Dolerite
igneous
Sandstone
Arenite (general term for sandstone)
Sedimentary Rock
Sandstone
Quartz Arenite (a type of sandstone composed of more than 90% quartz)
Sedimentary Rock
Fossiliferous limestone, likely coral or shell fragment
Calcitic limestone (primarily CaCO₃), containing preserved marine bioclasts
fossil
Hematite
Iron(III) oxide (Fe2O3)
mineral
Sandstone (Pebble/Conglomerate fragment)
Sandstone (clastic sedimentary rock)
Sedimentary Rock
Basaltic Tuff / Volcanic Breccia
Pyroclastic Breccia / Lithic Tuff
igneous
Magnetite or Hematite (Iron Stone)
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Polished brown jasper
Jasper, microcrystalline quartz (SiO₂) with iron-oxide impurities
metamorphic
Banded Chert / Banded Jasper (likely a variety of Chert/Chalcedony)
Chert (microcrystalline quartz)
Metamorphic Rock
White Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Sandstone (Pebble)
Sandstone (SiO2 dominated clastic sedimentary rock)
sedimentary
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Sandstone
Arenite (primarily Quartz-based Sandstone)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
Igneous
Vesicular Basalt
Basalt with vesicular texture
igneous
Gabbro
Gabbro
igneous
Chert (Flint Nodules)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary